Nodejs Array Unique unique()

Method Source Code

Array.prototype.unique = function() {
  var a = [];//  w  w  w.  j a v a  2 s  .c  om
  var l = this.length;
  for(var i=0; i<l; i++) {
    for(var j=i+1; j<l; j++) {
      // If this[i] is found later in the array
      if (this[i] === this[j])
        j = ++i;
    }
    a.push(this[i]);
  }
  return a;
};

Related

1. unique()

   Array.prototype.unique = function() {
     var n = {},r=[];
     for(var i = 0; i < this.length; i++) {
       if ( this[i] && !n[this[i]]) {
         n[this[i]] = true;
         r.push(this[i]);
     return r;
   ...
   

2. unique()

   Array.prototype.unique = function () {
     var obj,
       result = [];
     for (var i = 0, l = this.length; i < l; ++i) {
       obj = this[ i ];
       if ( result.indexOf( obj ) < 0 ) {
         result[ result.length ] = obj;
     return result;
   };
   

3. unique()

   Array.prototype.unique = function () {
     var r = [];
     o: for (var i = 0, n = this.length; i < n; i++) {
       for (var x = 0, y = r.length; x < y; x++) {
         if (r[x] == this[i]) {
           continue o;
       r[r.length] = this[i];
   ...
   

4. unique()

   Array.prototype.unique = function(){
       var i,j,len = this.length,tempArr = [],tempLen,state;
       for(i = 0 ; i < len ; i++){
           tempLen = tempArr.length;
           state = true;
           for(j = 0 ; j<tempLen;j++){
               if(this[i] == tempArr[j]){
                   state = false;
           if(state){
               tempArr.push(this[i]);
       return tempArr;
   };
   

5. unique()

   Array.prototype.unique = function() {
     var r = [];
     this.each(function(key, value) {
       if (!r.contains(value)) {
         r.push(value);
     });
     return r;
   };
   ...
   

6. unique()

   Array.prototype.unique = function() {
     var aryToReturn = Array();
     for (var i = 0; i < this.length; i++) {
       var val = this[i];
       if (undefined === aryToReturn.findFirst(function() {return this == val})) {
         aryToReturn.push(val);
     return aryToReturn;
   ...
   

7. unique()

   Array.prototype.unique = function(){
     var new_array = [];
     for (var i=0; i < this.length; i++) {
       if(!new_array.contains(this[i])) new_array.push(this[i]);
     return new_array;
   

8. unique()

   Array.prototype.unique = function(){
     this.sort((x,y) => x-y);
     for(var i=0; i<this.length-1; ){
       if(this[i]==this[i+1])
         this.splice(i,1);
       else i++;
     return this;
   

9. unique()

   Array.prototype.unique = function() 
       var h = {};  
       var r = [];
       this.forEach(function (item) { h[item] = true; });
       for (var item in h)
           r.push(item);
       return r;